Remote wireless control circuit for intelligent roller shutter door
A remote wireless, control circuit technology, applied in the direction of program control, computer control, general control system, etc., can solve the problem of inability to access the network and network equipment, single function, lack of auxiliary functions such as anti-theft, over-current protection and status feedback, etc. problem, to achieve the effect of saving printed board area, strong security, and low power consumption
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[0024] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0025] The core processor of the system adopts the STM32f103 chip, which is connected to the wireless network through the serial port to wifi module. Adopt 802.11b wireless standard and UDP communication protocol for wireless communication. The control board receives the control signal from the local area network, and after analyzing the command, the high and low levels of the corresponding general IO port are switched to control the triode amplifier circuit. The triode amplifying circuit provides the pull-in voltage for the relay coil to make the switching action. The motor overcurrent detection control circuit is composed of current transformer, bridge rectifier circuit and operational amplifier voltage comparator. The result is connected to the IO input pin of STM32, and when the voltage of the pin is detected to be low, the shutdown program is executed.
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